In this paper, a novel Dy₂O₃-Al₂O₃-SiO₂ (DAS) glass ceramic was designed and prepared for joining zirconia toughened alumina (ZTA) ceramic. The crystallization, thermal expansion behavior and wetting behavior of the DAS glass filler were studied. The effect of cooling rate and joining temperature on the microstructure and flexural strength of joints was investigated. The results show that slow cooling rate (15 °C/min) leads to crystallization of brazing seam, which causes the formation of pores in the joints due to the large density difference between the glass and the crystalline phases. The dissolution of ZrO₂ from ZTA substrate into the filler during joining process improves the mismatch of the coefficient of thermal expansion (CTE) between the brazing seam and substrate. The maximum flexural strength of 535 MPa is obtained when the joining temperature and cooling rate are 1475 °C and 50 °C/min, respectively.

本文设计并制备了一种新型的Dy ₂ O ₃ -Al ₂ O ₃ -SiO ₂（DAS）玻璃陶瓷，用于连接氧化锆增韧氧化铝（ZTA）陶瓷。研究了DAS玻璃填料的结晶，热膨胀行为和润湿行为。研究了冷却速度和连接温度对接头组织和抗弯强度的影响。结果表明，缓慢的冷却速度（15°C / min）导致钎焊缝结晶，这是由于玻璃相和结晶相之间的密度差较大而导致在接头处形成孔洞的原因。ZrO ₂的溶解在连接过程中，从ZTA基材到填充材料的填充会改善钎焊缝和基材之间的热膨胀系数（CTE）的不匹配。当接合温度和冷却速率分别为1475°C和50°C / min时，最大抗弯强度为535 MPa。